Abrading machine



May 7, 1957 Filed March 23, 1956 L. SCHALLER ABRADING MACHINE 6Sheets-Sheet 1 IN VEN TOR.

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May 7, 1957 Filed March 23, 1956 L. SCHALLER ABRADING MACHINE 6Sheets-Sheet 2 INVENTOR.

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L. SCHALLER 2,791,070

ABRADING MACHINE 6 Sheets-Sheet 4 INVENTOR. [ea 52% a He r BY $5MAttorney.

May 7, 1957 Filed March 23, 1956 ay 7, 1957 L. 'SCHALLER 2,791,070

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L. SCHALLER ABRADING MACHINE Filed March 23, 1956 6 Sheets-Sheet 6INVENTOR. Leo SCha Her BY @M ATTORNEY ABRADING MACHINE Leo .Schaller;Syracuse, N. Y., assignor to The Engelberg Huller Co., Incorporated,Syracusa'N. Y., a corporation of New York ApplicationMarch23, 1956,Serial No. 573,506.

11 Claims (Cl. 51-.-138) work piece. The'conveyor belt is supportedbelow the contact roll by a platen; and the machine embodies means foreffecting relative movement between the contact wheel and the platen foraccommodating work pieces of different thicknesses.

This invention has as an object an abradingmachine of the type describedembodying a particularly compact and eificiently operating structure forabrading work pieces formed of ferrous or non-ferrous materials andespecially work pieces having a small thickness dimension.

The invention consists in the novel features and in the combinations andconstructions hereinafter set forth and claimed.

In describing this invention, reference is bad to the accompanyingdrawings in which like characters designate corresponding parts in allthe views.

In the drawings- Figure 1 is a front elevational view with-parts insection and parts omitted.

Figure 2 is aside elevational view looking to thelcft. Figure 1, withparts in section.

Figure 3' is aview taken on line 33, Figure, 2.

Figure 4 is a top planview of the platen.

Figure 5 is a view taken on line 55, Figure 4.

Figure 6'is a front elevational view of one'of the work hold downmembers.

Figure 7 is a view lookingtothe left of Figured Figure 8 is a top'planview of the conveyor mechanism.

Figure 9 is a front elevational view of the conveyor mechanism, asindicated'by' the'line' 9-9; Figure 8.

Figure 10 is a View taken on a line corresponding to line 1010, Figure2, of the switch actuating mechanism for controlling the circuit to theoperating motor.

The base of the machine consists of a plate 2010 each side of whichthere is fix edly secured a vertically extending side plate 21 ofgeneral triangular shape, see Figures Z-and- 3. Thebase plate 20 ismounted on a plate fl3 positioned onbars it'd-supported by anglemerribers- 25 extending transverselyof a tank structure 25 which servesas a support for the machine and also a cabinet for containing coolantliquid. The plates 21 are bent inwardly at their forward edges'to forminwardly extending flanges 28, see Figure 3; A bar 32 is fixedly securedto each. of the fl'angesZS as by welding and formsassembly beingh'eldtogether by cap screws: 35 threading into the bars 32.

ited States Patent 2,791,070 Fatented May 7, 1957 ICC A: verticallydisposed frame. is .slidably mounted in these guideways, This frameconsists ofv a U-shaped member having a front wall 36. and side walls37. At spaced intervals, tubular members 38 extend transversely throughthe sidewalls .37 of the frame and are welded thereto. The outerprojecting end portions of the tubular members 33 areslottedandguidebars 39 are positioned vided withla gib 40. engaging. the outeredgeof the con: tiguous bar 39,. and-thegib iii is adjustable by.screws. 41.

1l1e.frame.further includes. a pair of rearwardiy tending platesarranged. in abuttingrelation to the.

lowerend portions-ofthe side walls.37 and beingfixed thereto byoverlappingpatch membersds, see Figure 3;. A plate 48 is mounted uponthe members 45 and forms.

a support for a motor 50 which provides power. for effecting rotation ofa contact roll 51.

The frontwall 36 of the frame is apertured to receive a spindlehousing52 having a radial flange 53 overlying.

the end wall 36:.and being secured thereto as by bolts 54, see Figures 2and 3. A spindle or shaft 55 is journalled in the housing 53 in suitableantifriction bearings, and the contactroll 51 is'operatively connectedto the motor 50 by a coupling 56. A plate-58 isfixedly secured to theouter surface .of each of the-plates .21 at the lower end portionthereof, see-Figures} and 3. 58 of the base structure extend forwardlybelow the con tactroll-Sl and serve to support a platen 59. The forwardportion ofthe platen is engaged by adjusting screws 64 threaded inbosses 65 secured to the inner surface of the side plates '58. Thesescrews 64 serve to level the platen ormove it about the pivot bolts atto bring the platen; in parallelrelation to the axis of the contact roll51% In the embodiment shown, the platen 59 consists of a platen recessis formed with bosses 6:5 threaded to receive sleeves 67 havinghexagonal heads 68. These sleeves ar internally threaded toreceiveadjasting screws 69; These rscrews are formed with enlarged headportions 753 mounted inrecessed bosses 71 for-media the ch ck body. Thescrews are fixedly secured in the bosses by screws 72.- The threads onthe sleeves-67 andscrews 69am of portions of the-yoke member to form amarginal surface flush with the plate 82.

The base plate 23' has secured to it a worm gear hour ing $4, Figures 1and 2, and from which vertically extends a screw threading into a nut 86mounted in a plate 87 fixedly secured in the bottom of the U-shapedframe member 36; 37. The worm of the reduction gearing mounted in thehousing 84 is actuated by a shaft 38 7 extending outwardly through the.iron wall of the cabinet 26 and provided with a hand wheel 89,. Withthis arrangement the frame, including the contact roll. '51 and the-1T1Q10 S ,fm&.y' be adjusted toward and fromthe p at ns? These sideplates The sleeves and screws are locked A bracket is mounted on anelongated plate 91 which is formed with elongated lengthwise extendingslots to receive screws 92 which are threaded into the front wall 36 ofthe frame column and are providedwith jam nuts 93; The plate 91 extendsupwardly above the bracket 90 and forms an inner support for a shaft 94.A plate 95 extends upwardly from the front end of the bracket. The shaft94 is pivotally mounted to the plate 91 on a pin 96. The forward end ofthe shaft 94 is mounted on a pin positioned in a block 97 which isslidably mounted in the plate 95. The block 97 is adjusted vertically bymeans of a screw 98 provided at its lower end with a hand wheel 99. Thisarrangement is to adjust the angularity between the axis of the shaft 94and the contact roll shaft 55 to effect proper tracking of the abrasivebelt 100 which is trained about the contact roll 51, and an idler roll101journalled on the shaft 92.

The bracket 87 is moved vertically, relative to the frame, by togglelinks 104, 105, joined together at like ends by a pivot pin 106. Theupper ends of the links 194 are pivotally connected to a collar 108 alsohaving a sliding connection with a block 109 carried by plate 88. Thiscollar carries an upwardly extending stem 110 extending through thebracket 87, and being provided at its upper end with a nut 111. The stem110 is encircled by a helical compression spring 112 acting between thecollar 108 and the bracket.

The lower ends of the links 105 are pivotally joined to a collar 115 bypin 116. This collar 115 is supported by a stem threaded into a bracket117 fixedly mounted in the frame. The links 104 are provided with anoperating handle 118 which, when moved upwardly from the position shownin Figure 2, breaks the toggle formed by links 104, 105, effectingdownward movement of the collar 108 and the bracket 87. This effectsdownward movement of the idler roll 101 to permit for the convenientreplacement of the abrading belt 100. Downward movement of the handle11-8 effects straightening of the broken toggle, moving the roll 101upwardly, and tension is maintained on the belt by spring 112. Thistension may be adjusted by manipulation of the stem in the bracket 117.

A bracket 120 is fixedly secured to the side wall of the tank 26 at theright. A plate 121, Figures 8 and 9, is secured to the bracket 120, asby screws 122, and is formed with side members 123 and cross members124, 125. A cross member 126 is fixedly mounted on a pair of guide pins127 slidably mounted in the cross members 124, 125. The member 126 isurged outwardly by helical compression springs 130 mounted on the pins127 and acting between the cross member 124 and the movable member 126.The cross member 126 is moved toward the member 124 against the actionof the springs by a screw 132 operated by hand wheel 133. A bar 134 ispositioned on the cross member 126 and is pivotally secured thereto atone end on a pin 136. This bar extends laterally from the bracket andhas a pulley 138 journalled on it. The bar 124 is movable about the pin136 by an adjustment screw 139.

A bracket 140 is fixedly secured to the opposite side wall of the tank26 and has journalled in it a shaft 141 carrying another pulley 142. Aconveyor belt 143 is trained over the pulleys 138, 142, with the upperrun of the belt passing over the platen 57, or the magnetic chuck 70carried thereby. The function of the belt 143 is to convey work piecesbelow the contact roll 51 so that the abrasive belt 100 can act upon theupper surface of the work pieces. The function of the magnetic chuck 70is to pull work pieces of ferrous material more tightly against theconveyor belt. The conveyor belt 143 is tensioned by springs 130 and isproperly tracked by screw 139.

The pulley 142 is rotated by a motor 144 connected to a gear reduction145 which, in turn, is connected to the shaft 141. The abrasive belt 100is contained within a casing provided with a door 151, the door beingremoved in Figure l. The machine is provided with hold down members forsecuring work pieces, formed of other than ferrous material, to theupper run of the conveyor belt. These hold down members, betterillustrated in Figures 6 and 7, consist of a plate 154 secured to theside walls of the casing 150, as by screws 155, see Figure l. The plates154 are formed with out-turned ears 156 between which a channel member158 is mounted for pivotal movement on pins 159. A bolt 160 is threadedinto the lower end portion of each of the plates 154 and projectsoutwardly through an aperture in the bottom wall of the channel members158. A helical compression spring 161 is interposed between the plates154 and the bottom wall of the members 158 to urge the same outwardlyfrom the plates about the pivot pins 159, this outward movement beinglimited by nuts 162 and lock nuts 163 threaded on the bolts 160.

Side plates 164 are fixedly secured to the sides of the channel members158 and extend toward the contact roll 151. A shoe 165 is fixedlysecured to the ends of the side plates 164, this shoe extendingtransversely of the upper run of the conveyor belt and a roller 167 isdisposed between the plates 164 and is journalled on a pin 168 carriedby the side plates. The arrangement is such that a work piece advancingon the conveyor belt towards the contact roll is engaged by the rollers167, and up ward movement of the rollers is yieldingly opposed by thesprings 161. The shoes 165 are positioned in close proximity to thetagential engagement of the work piece by the belt 98 passing about thecontact roll 51. In this manner, thin work pieces of other than ferrousmaterial are maintained in tight engagement with the conveyor belt, andthe belt is maintained against the surface of the platen and/ or themagnetic chuck 70.

A switch 170 is mounted upon the wall 36 of the frame structure and hasan actuator 171 engaging a cam 172. This cam is mounted on a shaft 173journalled in the wall 36 and provided at its opposite end with an anglelever 174 positioned to be engaged by the lower edge of the plate 91when the toggle is broken to effect downward movement of the bracket 90to permit changing of the abrasive belt 100. The shaft 173 also hasafiixed to it a lever 175, and a tension spring 176 is secured at oneend to this lever and at its opposite end to a bracket 177 fixed to theWall 36 of the frame. When the toggle is broken and the plate 91 ismoved downwardly, it engages the lever 174 effecting oscillation of theshaft 173 and actuation of the switch 170. The switch 170 is connectedto the starter for motor 50 and accordingly, when the toggle is brokento lower the pulley 101 to effect changing of the abrasive belt 100, themotor 50 can not be started.

The machine structure described, while economical to manufacture,provides a rigid arrangement permitting vertical adjustment of the frametoward and from the platen 59. I

What I claim is:

1. An abrading machine comprising a base, a pair of vertically. disposedplates fixedly secured to said base, each of said plates being providedwith a vertically extending guideway, a second pair of plates fixedlysecured to said base and extending forwardly therefrom, a platen mountedbetween said forwardly extending plates, a vertically disposed framemember U-shaped in cross section mounted between said guideways, theside walls of said frame being provided with ways having slidingengagement with said guideways, a shaft journalled in the front wall ofsaid frace and extending forwardly over said platen, a contact rollmounted on the forwardly extending portion of said shaft, the lowerportion of the side walls of said frame extending rearwardly, ahorizontally disposed plate carried by the rearwardly extending por tionof the side walls of said frame, a motor mounted on said plate and beingoperatively connected to said shaft to effect rotation of said contactroll, a bracket slidably mounted on the front wall of the frame adjacentthe upper end thereof for movement toward and from said contact roll,toggle mechanism operable to effect such movement of said bracket, anidler roll journalled on said bracket, and an abrasive belt trained oversaid rolls.

2. An abrading machine comprising a base, a platen fixedly mounted onsaid base, a pulley journalled on the base at each side of said platenand a conveyor belt trained over said pulleys with the upper run of thebelt extending over said platen, a pair of spaced apart guidewaysfixedly secured to the base and extending upwardly therefrom, a frameU-shaped in cross section with the side walls thereof extendingvertically between said guideways and having ways slidably mounted insaid guideways, a shaft journalled in the front wall of said frame andextending forwardly therefrom over said platen, a contact roll mountedon the extending portion of said shaft, a plate fixedly secured to theside walls of said frame, a motor mounted on said plate and beingoperatively connected to said shaft to effect rotation of said contactroll, a bracket slidably mounted on the front wall of said frameadjacent the upper end thereof, an idler roll journalled on saidbracket, toggle mechanism operable to effect vertical movement of saidbracket toward and from said contact roll, an abrasive belt trained oversaid rolls, and power means for operating said conveyor belt for theadvancement of work pieces below said contact wheel.

3. An abrading machine comprising a base, a platen carried by said base,a frame extending upwardly from the base, a contact roll journalled inthe lower portion of said frame and overhanging said platen, an idlerroll journalled in the upper portion of said frame, an abrading belttrained over said rolls, said platen being formed with a recess belowsaid contact roll, a magnetic chuck mounted in said recess, a conveyorbelt movable over said platen for the advancement of work pieces beneathsaid contact roll for engagement by said abrading belt, and meansoperable to adjust said frame toward and from said platen to accommodatework pieces of varying thicknesses.

4. An abrading machine comprising a base, a platen secured to the base,a frame extending upwardly from the base, a contact roll journalled inthe lower portion of said frame and overhanging said platen, an idlerroll journalled in the upper portion of said frame, an abrading belttrained over said rolls, said platen being formed with a recess belowsaid contact roll, a magnetic chuck mounted in said recess, meansoperable to adjust said chuck toward and from said contact roll and tolock said chuck in adjusted position, a conveyor belt movable over saidplaten for the advancement of work pieces beneath said contact roll forengagement by said abrasive belt, and a motor carried by said frame andoperable to effect rotation of said contact roll.

5. An abrading machine comprising a base, a platen fixedly mounted onsaid base, a vertically disposed frame mounted on the base for movementtoward and from the platen, a shaft journalled in the lower portion ofsaid frame, a contact roll mounted on said shaft, said contact rollbeing disposed above said platen and extending transversely thereof inparallel relation thereto, an idler roll journalled in the upper portionof said frame, an endless abrasive belt trained over said rolls, apulley journalled on the base at each side of said platen, a conveyorbelt trained over said pulleys with the upper run of the belt extendingover said platen for the conveyance of work pieces beneath said contactroll, a motor carried by the frame and being operatively connected tosaid contact roll, and means operable to adjust said frame verticallytoward and from said platen.

6. An abrading machine as defined in claim 1 and including a magneticchuck mounted in said platen below said contact roll.

7. An abrading machine comprising a base, a platen secured to the base,a frame extending upwardly from the base, a contact roll journalled inthe lower portionof the frame and being disposed above said platen, anidler roll journalled in the upper portion of the frame, an abrasivebelt trained over said rolls, a conveyor belt movable over said platento advance work pieces past said contact roll, work hold down membersmounted on the frame at opposite sides of said contact roll and beingoperable to yieldingly press work pieces against said conveyor belt.

8. An abrading machine comprising a base, a platen secured to the base,a frame, a contact roll journalled in the frame above said platen, anidler roll journalled in the frame, an abrasive belt trained over saidrolls, a conveyor belt movable over said platen to advance work piecespast said contact roll, means operable to adjust said frame toward andfrom the platen, a support mounted on the frame at opposite sides ofsaid contact roll, a roller journalled in each of said supports, saidrollers being disposed for engagement with said conveyor belt in closeproximity to said contact roll, and means yieldingly urging said rollsagainst the surface of said conveyor belt.

9. An abrading machine comprising a base, a platen secured to the base,a frame extending upwardly from the base, a contact roll journalled inthe lower portion of the frame and being disposed above said platen, anidler roll journalled in the upper portion of the frame, an abradingbelt trained over said rolls, means operable to adjust said frame towardand from said platen, a conveyor belt movable over said platen toadavncc work pieces in engagem'ent with the abrasive belt passing aboutsaid contact roll, a work hold down member mounted on the frame at eachside of said contact roll, a roller journalled in each of said hold downmembers, and means yieldingly urging said rollers against the surface ofsaid conveyor belt.

10. An abrading machine comprising a base, a platen secured to saidbase, a frame extending upwardly from the base, a contact rolljournalled in the lower portion of the frame, an idler roll journalledin the upper portion of the frame, and an abrasive belt trained oversaid rolls, a conveyor belt movable over said platen for advancing workpieces beneath said contact roll, a work hold down mem ber mounted onthe frame at each side of said contact roll, said hold down membersincluding a pair of spaced apart side plates, a work engaging shoesecured to said side plates and extending transversely of the conveyorbelt, a roller journalled between said side plates in proximity to saidshoe, and means yieldingly moving said side plates downwardly tomaintain said shoes and rollers in engagement with said conveyor belt.

11. An abrading machine comprising a base, a platen fixedly secured tosaid base, a frame extending upwardly from the base, a contact rolljournalled in the lower portion of said frame, a bracket mounted in theupper portion of said frame for movement toward and from said contactroll, an idler roll journalled on said bracket, an abrasive belt trainedover said rolls, a switch mounted on said frame, switch actuatingmechanism operable upon movement of said bracket toward said contactroll to actuate said switch, a motor mounted on said frame and beingoperatively connected to said contact roll to effect rotation thereof,and a control circuit for said motor including said switch, said switchbeing operable upon actuation to render said motor inoperative.

References Cited in the file of this patent UNITED STATES PATENTS1,995,382 Fenton Mar. 26, 1935 2,272,273 Parker Feb. 10, 1942 2,612,007Bell Sept. 30, 1952 FOREIGN PATENTS 664,084 Great Britain Mar. 20, 1950

